William N Costaras
Professional Summary
William N Costaras is a registered financial advisor currently at MCDONALD PARTNERS LLC located in Cleveland, Ohio. William is registered as a RR (Registered Representative) and started their career in finance in 1973. William has worked at 8 firms and has passed the Series 7TO, Series 57TO, SIE, Series 55, Series 3, PC and Series 1 exams.
At a Glance
Fiduciary Standard
Fee Structure
Account Minimum
Active Clients
Fiduciary Standard
Fee Structure
Account Minimum
Active Clients
Other Aliases
There are no additional aliases reported.
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Videos & Posts
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Contact Information
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Disclosures are events reported to regulators, such as customer disputes, regulatory actions, employment separations, or financial events. Some are resolved, denied, or contested — a disclosure is not a verdict. We recommend asking an advisor directly about any disclosure on their record.
Disclosures on record.
Disclosures can be potential red flags, including customer disputes, regulatory fines, employer terminations, bankruptcies, judgments, liens, or certain criminal activities. Check for any disclosures as part of your thorough research when choosing an advisor.
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Years of Experience
53 years registered in the securities industry
Current & Past Employments
Current
Past
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Current Firm
MCDONALD MANAGEMENT LLC | THOMAS MCDONALD PARTNERS, LLC | THOMAS MCDONALD & ASSOCIATES LLC | THOMAS MCDONALD & ASSOCIATES | MPCF LLC | MPCF II LLC | MP127 LLC | MP DPI LLC | MCDONALD USAF GP LLC | MCDONALD PARTNERS LLC
Contact Information
Main Address
1301 East 9th Street Suite 3700, Cleveland, OH 44114Mailing Address
1301 East 9th Street Suite 3700, Cleveland, OH 44114Phone Number
(216) 912-0567Established
Ohio since 04/05/2005Firm Type
Limited Liability CompanyFiscal Year End
DecemberFirm Size
Small# of Employees
29SEC notice filing (42 States and Territories)
Registered to provide investment advisory services in 42 US states and territories.
FINRA licenses (48 States and Territories)
Registered to provide investment advisory services in 42 US states and territories.
Documents
Direct owners and executive officers
| Name | Position | CRD# |
|---|---|---|
| MCDONALD, THOMAS MARION | OWNER | 326904 |
| MCDONALD, ARNOLD BEATTY | FINANCIAL & OPERATIONS PRINCIPAL | 5126644 |
| MCDONALD, ARNOLD BEATTY | CEO/CFO/MUNI PRINCIPAL/OWNER | 5126644 |
| MCDONALD, BRIAN ANDREW | OWNER | 3037343 |
| NEMRY, RAFAT NAIN | OWNER | — |
| HEGARTY, WILLIAM MAURICE JR | CHIEF INVESTMENT OFFICER | 2784174 |
| MANSOUR, RITA | OWNER | 1968418 |
| MCARDLE, JOHN EDWARD III | OWNER | 5386698 |
| PALMER, JAIMIE MICHELLE | CHIEF COMPLIANCE OFFICER | 4930309 |
| YAKO, THOMAS ANTHONY | DIRECTOR | 3002163 |
Regulatory Assets Under Management
Total Number of Accounts
1,765AUM (Assets Under Management)
$1,279,273,513Disclosures
Regulatory Event
5Arbitration
1Accountant Surprise Examination Report
| Filing Date | Form ADV-E Cover | Form ADV-E Report |
|---|---|---|
| 10/02/2025 | Cover Page | Report |
| 10/02/2025 | Cover Page | Report |
| 01/06/2025 | Cover Page | Report |
| 01/06/2025 | Cover Page | Report |
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Other business activities
Information obtained from regulatory filings. Advisors can request corrections through their firm or regulator.
Outside business activity is any business or activity undertaken by an advisor that is outside the scope of their relationship with their firm (e.g., consulting services, real estate, freelance work, teaching, etc.). Investors should stay informed about these activities to ensure no conflicts of interest.
The advisor shows no other business activity.
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Primary Firm SEC Registration
MCDONALD MANAGEMENT LLC | THOMAS MCDONALD PARTNERS, LLC | THOMAS MCDONALD & ASSOCIATES LLC | THOMAS MCDONALD & ASSOCIATES | MPCF LLC | MPCF II LLC | MP127 LLC | MP DPI LLC | MCDONALD USAF GP LLC | MCDONALD PARTNERS LLC
State Registrations and Notice Filings
(10/9/2019)
(4/30/2019)
(2/3/2015)
(10/9/2019)
Don't see your state listed? The advisor may still be able to work with you under the federal De Minimis Rule, which allows up to five investment advisory clients in a state without registration. Some states, like TX, LA, NE, and NH, may still require registration or notice filing. Contact the advisor or their firm to confirm their investment advisory availability in your state.
Exams
Financial professionals may take different exams throughout their careers based on the types of services they provide and roles they perform.
Series 55 — Limited Representative-Equity Trader Exam
Passed Nov 2001PC — AMEX Put and Call Exam
Passed Sep 1977Series 1 — Registered Representative Examination
Passed Jun 1973SRO Registrations
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CRS (Client Relationship Summary) - BD
Click below to view William N Costaras's CRS (Customer Relationship Summary).
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